12218475 has 24 divisors (see below), whose sum is σ = 20413872. Its totient is φ = 6448000.

The previous prime is 12218443. The next prime is 12218489. The reversal of 12218475 is 57481221.

It is not a de Polignac number, because 12218475 - 2⁵ = 12218443 is a prime.

It is a super-2 number, since 2×12218475² = 298582262651250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6769 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (850578).

Almost surely, 2^12218475 is an apocalyptic number.

12218475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12218475 is a deficient number, since it is larger than the sum of its proper divisors (8195397).

12218475 is a wasteful number, since it uses less digits than its factorization.

12218475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727 (or 1722 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 12218475 is about 3495.4935273864. The cubic root of 12218475 is about 230.3238977837.

Adding to 12218475 its reverse (57481221), we get a palindrome (69699696).

The spelling of 12218475 in words is "twelve million, two hundred eighteen thousand, four hundred seventy-five".